Insane Hydraulics

Site theme image

Let's Talk Hydraulics

This section is devoted to all possible and impossible hydraulics related issues. Some of the articles were born "in the heat of the moment" and therefore may contain "less delicate vocabulary". Please, judge accordingly...


Magic Number Two or Thoughts About Specific Heat of Hydraulic Oil
AC Motor Driven Test Benches - Don't Forget About Power Factor!
Post-Compensation for Dummies - Part One
Post-Compensation for Dummies - Part Two
Pre-Compensated Flow Control With Flow Sharing?!!
Pre-Compensated Flow Control With Flow Sharing - Compensator Example (and Some Catalog Talk)
My IoT Story - the Beginning
How Good Is Your ServiceJunior Digital Pressure Gauge?
If You Use Pressure Transmitters and Pressure Transducers You Should Read This!
Adjusting Relief Valves in Hydraulic Systems - The Easy Way or The Hard Way?
17 Good Things About Being a Hydraulic Technician
14 Bad Things About Being a Hydraulic Technician
Shaft Seals That Can Break Your Pump
To Dither or Not to Dither - That is the Question!
Never, but Never Trust a New Hydraulic Pump or Motor
LS Line Flow - Another Way to Get in Trouble
Can Pump Flow Test Predict The Life Span?
4-Way Directional control Valves - Which Way Will the Oil Go?
Copying Load Sensing Pressure While Thinking About Self-Education
Broken Not Broken Pumps
Combining a Danfoss PVG32 and a Kawasaki K3V63DT into an NFC System
Back-Engineering for the Sake of Learning Industrial Hydraulics
A New Way to Steer with a Danfoss PVG32 Valve
How High is Your Low?
Reading Charge Pressure - Where and What For
Closed Loop Flushing
Infrared Gadgets
Hydraulic motors - barrels and shafts - Do you know what drives what?
Severe Service Negligence or How to Win a Stupidity Competition
About Closed Loop Bypass Systems and "Bogus" Failures
Use of Pressure Filters in Closed-Loop Transmissions
Gear Motor Stall
The Best Hydraulic Component Repair Tip In The World
The Ideal Hydraulic Pump Test Bench - Part One
The Ideal Hydraulic Pump Test Bench - Part Two
About "Left" and "Right" Adjustments
Old Diesel Driven Hydraulics or Can You Stop the Monster?
A Hydraulic System That Would Not Stop
Troubleshooting Low Flow in Closed Center Load Sensing Systems
The Perfect Instrument for Measurement of Low and Extremely Low Flow Rates.
Can You Use Your Hands to Diagnose Hydraulic Equipment?
Two Small Symptoms than may Indicate an Imminent Failure of a Hydraulic Pump
Field Test of a Closed Loop Pump
Cavitation in Hydraulic Systems
Add-On to the Article on Cavitation in Hydraulic Systems
Catalogue Fever
How Test Hoses Affect the Ability to Read Pressure Spikes
Emotional Tune Up
My First Animation Ever
Shoes Under Scope
Digital Vs. Analogue
Closed Loops and Buckets...
Learn Them Diagrams
Excessive Case Pressure in Pumps With Internal Drain-to-Suction Line Connection
Want to Touch a Gear Pump?
Things That Can Go Wrong When You Assemble A Gear Pump
Once Again About Suction Filters
Calculating Displacement of a Gear Pump
Bar, Mpa, Atm, and an Almost Ruptured Hose
Hydraulic Balance
A Word About Oil Baths
Before Disassembling an Orbital Motor...
Timing Orbital Motors Without a Manual
Gerotor Motors and Very Low Speed
Why Orbital Motors are a Poor Choice for Static Torque Creation
The Sixth Sense
A Trobleshooting Technique I See All The Time
Not so Obvious Obvious
Double Gear Pumps and Double Tanks
Difficult to Unscrew? - Use Double H Technique!!!
Checking Hydraulic Accumulator Pre-Charge Without a Charging Kit
Three Simple Checks to Check
Watch out for the Shuttle!
Animation Two - Bent Axis Hydraulic Motor
Relief Valves, Do You Always Test Them?
Healthy Amount of Fooling Around
Finding Zero, Part 1
Finding Zero, Part 2
Finding Zero, Part 3
Hydraulic System With no Oil Tank
His Name Was Hysteresis
Pressurized Fluid Hazards
The Reuse of Spilled Oil in a Shop
Watch Where You Step!
Fine-tuning Your PC
Danfoss Series 90 Multi-Function Valves
Disassembling Multi-Function Valves
A Way to Flush
Ten Steps to Changing Hydraulic Oil
Multi-Section Gear Pump Vs Danfoss PVG32
Hydraulic Jacks, Solenoid Valves, Low Voltage and Broken Doors
Silly Mistake - with visual and audio example
Wax Motor Operation
Testing Solenoid Valves
When Your Hydraulics is Powerless
Silicone Fever
Bearings That Never Break
Bent-Axis Units - Using Displacement Limiters for Diagnostics
How to Mount and Dismount Piston Rings in Hydraulic Pumps and Motors
Managing Self-Oscillation of Displacement Controls with Controlled Leakage
A Couple of Tips on How to Make Small Diameter Orifices
Baldest Pump Overhaul Ever!
Aftermarket Spares - Thoughts and Examples
Workshop Rage
Best Way to Learn Pump Troubleshooting
About the Use of Fast Couplings in Hydraulic Motor Drain Lines
Hidden Orifice in Rexroth A10VO series 52 Swash Plate You Should Know About
Evaluating Pump Drains with The Five Plus Five Rule
Interesting Load Sensing Case and Thougths on Rushed Troubleshooting
When in Doubt - Bleed it Out!
Closed Loop Failure Due To Line Elasticity and How To Avoid It
If You Intend to Store a Pump or a Motor...
Know Your Code Names!
What Does 7500-Hour Wear Look Like?
Parker P1-100 Pump After 14000 Hours of Operation
Parker PV140 Hydraulic Pump After 14,000 Hours of Operation in Harsh Conditions
I Wonder if This Can Be Considered a Pump "Longevity Hack"?
Industrial DIY
How Oil Viscosity Affects Turbine Flow Meters
Negative Flow Control vs Load Sensing - Which One is Better?
The Tale of the Golden Safety Rule
Turn Your Enemy Into a Friend!
Random Thoughts About Selling Hydraulic Stuff
How to Make Your HPU Designs a Lot Better
An Impossible Shaft Seal Leak
Pressure-Dependent Swashplate Torque in Inline Axial Piston Pumps
DC Coils of Solenoid Operated Valves
This Wear Pattern can "Fool" You
Should You Cheap Out on Your Hydraulic Oil?
The Importance of Knowing Where The Grub Screw Plugs and Orifices Are Located in Your Hydraulic Pump
DIY Pressure Tester That Can Reach 1000 bar
Tackling Torque Limiting Pump Controls - Part One
Tackling Torque Limiting Pump Controls - Part Two
Tackling Torque Limiting Pump Controls - Part Three
Tackling Torque Limiting Pump Controls - Part Four (Going Hyperbolic!)
Tackling Torque Limiting Pump Controls - Part Five
Another Way a Shuttle Valve Can Fail or Am I Too Paranoid?
Installation of Axial Piston Pumps Above The Oil Level
Be Careful When Overhauling "Hydraulic Twins"
A Left-Hand Valve Plate in a Right-Hand Pump?!!
Closed Loop Recommissioning - Know When to Be Paranoid About Cleanliness!
Looking Into SAE J517 Standard for Hydraulic Hoses